Properties of Group 7
Lesson 4 / 8
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I can describe patterns in the properties of group 7 elements and explain how these are determined by their electron structures.
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Group 7 elements are very reactive and their reactivity decreases down the group.
Moving down Group 7 elements, atomic mass, density, and melting and boiling points increase.
In chemical reactions, atoms of Group 7 elements gain one outer electron making just full electron shells.
Going down Group 7, the force attracting an extra electron reduces with the distance of each shell from the nucleus.
Halogens are elements, halides are salts.
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